{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU4521-0BP10","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU4521-0BP10","canonicalUrl":"https://aoctrl.com/siemens/4EU4521-0BP10","factsUrl":"https://aoctrl.com/api/mcp/products/4EU4521-0BP10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EU4521-0BP10 commutating choke for converter, 3-phase AC, rated 1170A, 380V, 50Hz, 0.035mH, IP00, thermal class H.","salesMarkdown":"The Siemens 4EU4521-0BP10 is a commutating choke (line reactor) for a converter — the thing that sits between the drive and the line to smooth current spikes and limit fault current rise rates. It's a 3-phase AC choke rated for 1170 A continuous at 380 V, 50 Hz, with an inductance of 0.035 mH. The 1170 A rating is the thermal continuous current (Ith) — that's the max RMS current it can carry indefinitely without exceeding the 40 °C ambient temperature rise limit. In DC applications it's rated 1433.8 A, so it handles the higher RMS of rectified current without saturating. IP00 means it's an open-frame component — no enclosure, no drip shield. It lives inside a cabinet, not on the wall. Mounting dimensions are 0.46 m wide by 0.435 m tall by 0.293 m deep, so plan the panel real estate accordingly. That's typical for commutating duty: high enough to limit di/dt for the converter's thyristors, low enough to keep voltage drop manageable under load. Thermal class H insulation handles sustained hot spots. Power loss is 746 W in the coil and 263 W in the iron core. Connections are flat-type terminals. Use a busbar or flat braid for power cables. At 0.46 m wide, 0.435 m tall, and 0.293 m deep, this choke takes up a significant footprint — roughly the size of a small suitcase. It's not a DIN-rail component; it bolts directly to the backplate or a mounting frame. Heat dissipation is 746 W coil plus 263 W core. At 40 °C ambient, account for thermal rise in the enclosure.","metaTitle":"Siemens 4EU4521-0BP10 Commutating Choke, 1170A 3-Phase AC","metaDescription":"Siemens 4EU4521-0BP10 commutating choke for converter. Rated 1170A AC, 1433.8A DC, 380V, 50Hz, 0.035mH. IP00, thermal class H. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.293m","Width":"0.46m","Height":"0.435m","Maximum":"1 170A","Rated Value":"1 170A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"1 433.8A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.000035H","Power loss [W] of the coil":"746W","Operating voltage rated value":"380V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","Power loss [W] of the iron core":"263W","Thermal class acc. to IEC 60085":"H","Type of electrical connection for main current circuit":"flat connector","Relative inductive drop in voltage on the measurement level current, voltage and frequency":"5.86%"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=350117&mlfb=4EU4521-0BP10","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU4521-0BP10/alternatives.json"},"ai":{"faq":[{"question":"What are the physical dimensions of the 4EU4521-0BP10?","answer":"Width is 0.46 m, height is 0.435 m, and depth is 0.293 m. It's an open-frame (IP00) component that bolts to a backplate, not DIN-rail mountable."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU4521-0BP10","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/4EU4521-0BP10 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}